Novel extraction of chromatographic resins based on tetraalkyldiglycolamides: Characterization and potential applications

Two new extraction chromatographic resins containing the diglycolamide class of molecules have been prepared and characterized, and potential applications identified. The new resins consist of 40 weight percent N, N, N'N' tetraoctyldiglycolamide (TODGA) and N, N, N'N' tetrakis-2-ethylhexyldiglycolamide (TEHDGA) sorbed onto 50-100 mu m particle size Amberchrom (R) CG- 71. The new resins have capacities for Eu of approximately 0.086 mmol/ mL of bed and are quite stable to extractant leaching. The resins were characterized by measuring the batch uptake of actinides, lanthanides, and yttrium, alkaline earths and 13 selected transition and post-transition elements from HNO3 and HCl. Based on the uptake data, a number of very efficient separations were achieved using 0.5 - 2mL bed volume columns and room temperature operation.